The precision tapered roller bearing of Huanyu Bearing Research won the third prize of technology
Screw compressors are widely used in aerodynamics, refrigeration and air conditioning, and gas compression in various process flows. Rotor bearings are key components that directly affect the volumetric efficiency and reliability of screw compressors. Rolling bearings used in screw compressors generally require a bearing with a calculated life of more than 50,000 hours. According to statistics, 50% of all running positive displacement compressors are screw air compressors. Because the screw air compressor requires high precision, long service life and high reliability of the rolling bearing, in the past, the domestic screw air compressor rotor bearing used imported bearings. With the rapid development of the domestic compressor industry, the demand for screw air compressor rotor bearings with high precision, long life and high reliability is increasing. The screw air compressor has a compact design. The weight of a screw air compressor is about 1/7 to 1/13 of the weight of a comparable power piston compressor, and is usually directly connected to the prime mover without a reducer. The higher the speed, the bearing needs to withstand medium and above loads. Through the research and development of the screw air compressor rotor bearing, Huanyu Company has significantly improved the speed and accuracy of the bearing, especially the life level, shortened the gap with similar foreign products, and achieved the goal of localization. Huanyu Bearing Co., Ltd. is only a medium-sized professional bearing manufacturer in our province. Why is it winning? “Continuous investment and continuous innovation.†The person in charge of the company introduced that since its establishment in 1998, the company has been advancing in the face of fierce market competition. The transformation of technology and equipment has already possessed domestic first-class heat treatment, automatic temperature control and new and advanced bearing assembly and cleaning production lines, as well as advanced testing equipment and laboratories. Now it has become a national high-tech enterprise with fixed assets of 140 million yuan and a factory area of ​​over 80,000 square meters. Huanyu Company's "Academician Expert Workstation" is the first in Changshan County. They have long-term cooperation with the academician team. They have invested more than 6 million yuan in research and development, focusing on the raw materials, forging, spheroidizing, heat treatment and cold treatment of precision bearings. Breakthrough research and development. In November 2014, this award-winning product passed the expert review and appraisal of provincial industrial new products, and its quality and technical level reached the domestic leading level. In December 2015, the company has two new products that have passed the review and appraisal of provincial industrial new products, and have been upgraded on the original basis, and its technical level has reached the international advanced level. It is precisely because of years of accumulation that the company has obtained 1 invention patent, 10 utility model patents and 5 provincial new products.
Stamping is a kind of process
that obtaining the required
shape and size of the parts by outside force on the metal sheet, strip, pipe shape material use mould and press machine,
in order to produce plastic deformation or separation. Stamping and
forging belong to plastic processing (or pressure processing), called the
forging press. The mainly stamping billets are hot rolling and cold rolling
steel plate and steel belt.
Stamping processing is a
production technology that use of conventional or special equipment of the
power, make the deformation sheet metal deformation in the mould. Thereby
produce a certain shape, size and performance parts. Sheet metal, stamping
mould and equipment are the three elements of stamping.
Stamping characteristics:
Compared with the castings,
forgings, stamping parts have the thin, uniform, light and strong characteristic. Stamping can make other methods are difficult to manufacture, such
as rib stiffener, flanging, ups and downs, or flanging products, in order to improve its stiffness. Because use precision mould, the
precision of part can reach micron grade, and repeat precision is high, the
specification is consistent, can punch a hole nest, convex sets, etc. Cold
stamping generally no longer by machining, or only need a small amount of
machining. Hot stamping precision and surface state is lower than the cold
stamping parts, but it's still better than the castings, forgings, less cutting
processing capacity.
The Advantage of stamping:
(1) The stamping process is high production efficiency, and easy
to operate, easy to realize mechanization and automation.
The process classification
of stamping:
Stamping is mainly classification by process, can be divided into
separation process and forming process. Separation process is also called the
blanking, and its purpose is to make the sheet metal of stamping parts
separated along the contour line, and at the same time guarantee the quality of
the separation section requirements. Forming process is designed to make sheet
metal occurred plastic deformation under the condition of not to break the
billet, made into the required shape and size of parts. In the actual
production, it is often a variety processes integrated applied to one part. Cutting,
bending, shear, deep drawing, bulging, spinning, correction are the main
stamping processes.
The conventional material of stamping part: Aluminum sheet like 6061,6063, stee alloy sheet like Q235, ST37-2, Stainless steel sheet like SS304,SS316;
The precision of the
stamping part: ±0.1mm;
The thickness of the metal
sheet we can do: 0.5mm~12mm;
The max size of the
stamping part in my factory: 1mX1m;
Surface preparation methods: Powder coating, Painting, Plating,
Electrophoresis, Polishing.
The Metal stamping and QC control equipment
Metal Stamping Parts, Precision Metal Stamped Parts, Steel Stamping Parts, Stainless Steel Stamping Parts, Aluminum Stamping Part NINGBO BEILUN LEMA MACHINERY TECHNOLOGY CO.,LTD , http://www.china-lema.com
The author learned from the relevant departments that the “screw compressor with high-speed precision tapered roller bearing†developed by Zhejiang Huanyu Bearing Co., Ltd. won the third prize of “China Machinery Industry Technology and Technology Award†and realized the zero award of Changshan County Bearing Industry. breakthrough.
“National tens of thousands of machinery and industrial enterprises have won only 189 third prizes, which is not easy.†The person in charge of the company told us that the “China Machinery Industry Science and Technology Award†was established by the China Machinery Industry Federation and the China Mechanical Engineering Society in 2001. Established together and selected once a year.
“We successfully developed high-precision long-life screw air compressor rotor bearings in 2014, and continued to innovate and developed high-speed precision tapered roller bearings for screw air compressors. The two are coherent in technical achievements. The person in charge of the company told us.
(2) The mould ensure the
stamping precision of the size and shape when stamping, and generally does not
destroy the surface of the quality of stamping parts , and the life of the
mould are long, so the stamping quality is stable, has the characteristics of
"the same".
(3) The stamping can produce the part that
size range is larger, more complex shape parts, such as small to stopwatch of
watch, big to Auto longeron, cover parts, etc., and stamping material hardening
effect of cold deformation, the strength and stiffness of stamping is high.
(4) Stamping generally has no chip broken
material, material consumption is less, and do not need other heating equipment,
it is a kind of machining method that material saving, energy saving, stamping
parts cost is low.
